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Simplifying 2x + 7(x + 3) = 9(x + -1) + 5 Reorder the terms: 2x + 7(3 + x) = 9(x + -1) + 5 2x + (3 * 7 + x * 7) = 9(x + -1) + 5 2x + (21 + 7x) = 9(x + -1) + 5 Reorder the terms: 21 + 2x + 7x = 9(x + -1) + 5 Combine like terms: 2x + 7x = 9x 21 + 9x = 9(x + -1) + 5 Reorder the terms: 21 + 9x = 9(-1 + x) + 5 21 + 9x = (-1 * 9 + x * 9) + 5 21 + 9x = (-9 + 9x) + 5 Reorder the terms: 21 + 9x = -9 + 5 + 9x Combine like terms: -9 + 5 = -4 21 + 9x = -4 + 9x Add '-9x' to each side of the equation. 21 + 9x + -9x = -4 + 9x + -9x Combine like terms: 9x + -9x = 0 21 + 0 = -4 + 9x + -9x 21 = -4 + 9x + -9x Combine like terms: 9x + -9x = 0 21 = -4 + 0 21 = -4 Solving 21 = -4 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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